77202C

Overview

The Murata Power Solutions 77202C is a pulse transformer from the 772 series, designed for medium power applications in switch mode power supplies and thyristor or triac firing circuits. It features a 1:1:1 turns ratio and an inductance of 1 mH. The component utilizes an encapsulated construction with through-hole mounting terminals. This device is intended to provide isolation and signal transmission in high-frequency power control environments.

Feature Summary

• Encapsulated pulse transformer design for robust performance
• 1:1:1 turns ratio suitable for gate drive isolation
• Through-hole mounting configuration for PCB integration

Applications

• Switch mode power supply (SMPS) gate drive circuits
• Thyristor firing circuits
• Triac firing circuits

Procurement Notes

Verify current availability status as the manufacturer has scheduled this part for obsolescence. Confirm that the through-hole package and encapsulation type match the target board layout requirements. Ensure the 1 mH inductance and 1:1:1 ratio align with the specific isolation and timing needs of the application circuit before finalizing procurement.

Selection Notes

Select this component when designing isolated gate drivers for SCRs or TRIACs requiring medium power handling. The 1:1:1 ratio indicates it is used for signal coupling rather than voltage transformation. Consider the through-hole form factor if surface mount options are not feasible for the mechanical assembly constraints of the power supply design.

Part Context

The 77202C belongs to the 772 series of pulse transformers manufactured by Murata Power Solutions. This series is specifically engineered for use in power electronics where reliable isolation between control logic and high-power switching elements is required. The encapsulated construction protects the internal windings from environmental factors common in industrial power applications.

Replacement Considerations

This component is scheduled for obsolescence by the manufacturer. Engineers should identify alternative pulse transformers with matching 1:1:1 ratios, similar encapsulation styles, and compatible through-hole footprints to ensure continuity of production.